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Crawford sent me the eco block for free to test, I have a 2014 frs, it has the trd intake, trd shift kit, flowmaster catback on it, i too was skeptical about what it did, Crawford told me if it was bad for the engine a check engine light should kick on, and if it did to go ahead and remove the block and send it back.
Anyways i put it on the car, and i have noticed a difference in the butt dyno, mainly from 3k-4k rpm in the dip it has improved throttle response in that range, i have noticed i can run 3rd gear at about 1000 rpm and hit the gas and the throttle response is smoother and no need to downshift. So far havent noticed any improvement to miles per gallon though, seems to have decreased about 1mpg, but its hard to tell the wind has been blowing 60mph everyday out here in the texas panhandle since i put it on.
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